Is it worth it making a ZFS partition with compression for Postgres in order to save space? I assume since it's mostly text it should compress fairly well.
Or is there a better FS for compression?

@matrix block size plays a huge role in this as well.
It really depends on your use case.
How big is your database?

@sjw
100GB Mastodon and 40GB Misskey

@matrix

dayum, disk space is super expensive with my discount VPS, what are you using for hosting?

@sjw

@ademan @sjw BuyVM
It is expensive. I'm paying $45 for it.